The warning came as he sentenced Bradley Regan, 18, of Quincy for having sex with a 14-year-old girlfriend at least 10 times last April. It was the second case of the morning involving an 18-year-old boy and 14-year-old girl.

O’Grady said one issue was "hormonal," but warned the teen boys that they had better focus on their futures.

"This will put you in prison" even if the sex is consensual, he said. Age of consent in Michigan is 16.

O'Grady also said, "I don’t care about the morning-after pill," a jab at the Obama administration’s decision to allow over-the-counter sale of a contraceptive drug to anyone over 15.

While the 14-year-old girl involved with Regan said one of the times the sex was not consensual, the judge noted contradictory statements and efforts by the office of Branch County Prosecutor Ralph Kimble to contact the girl failed to clarify the issue.

Defense attorney Bill Renner noted there were numerous text messages and pictures of the pair. After the girl found Regan had been with another girl, "She said she was going to get him and she got him."

"I committed a crime and I am sorry for that," Regan told the judge. The teen was placed on five years probation and sentenced to six months in the county jail, all time over 90 days suspended.

In this case the sentence is under the Holmes Youth Training Act (HYTA) because there is no prior record. That means if Regan successfully completes probation he will not have a conviction listed on his record and therefore will not have to register as a sex offender for the next 25 years.

Renner called the registry requirement "the gift that keeps on giving for at least 25 years."

Earlier Kevin Jai, 18, of Coldwater pleaded guilty to CSC fourth degree with his 14-year-old girlfriend New Year’s Eve. He will be sentenced in June.

In both cases the original charges was CSC third degree, a 15-year felony with mandatory prison time.

In 2008 the Michigan legislature amended the state’s criminal sexual conduct laws after number of teens in the Detroit metro area were found to be involved in high school sex parties and relationships. It created what is now called "the Romeo and Juliette" exceptions to the registration act.

In those instances where one participant is 14-years old or older and the other is no older than 17 and all the sex is consensual the registration as a sex offender is waived and the conviction can be withheld upon successful completion of probation.